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Single Family ResidenceResidential
$1,573,042$375 / ft²
TopHap EstimateOur estimate of what this home would sell for today, based on nearby sales, the home's size and features, and local price trends. It is a starting point, not an appraisal.· confidence 92How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026

121 SEBASTIANS RUN

AUSTIN, TX 78738
4
Baths
4,197 ft²
Living AreaTotal finished area of the structures, from county records. Some counties include shared space like hallways or a building gym, so it may not match a listing.
0.45 ac
Lot SizeThe size of the land the home sits on, from county records.
2004
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.6M
$1.5M low$1.7M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$13,015 (2024)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$991,318 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$289,615
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$701,703
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$937,474
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$991,318

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyTravis
Lot (acres)The size of the land the home sits on, from county records.0.45
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Mat/Raft Foundation (Slab)
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Yes
CoolingThe type of cooling or air conditioning in the home.Yes
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.Pool W/Hot Tub/Spa
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Patio · 840 ft²Porch · 261 ft²

Transaction History(2)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

H
Lake Travis High SchoolA-
High · Grades 9–12 · 0.6 mi
E
Lakeway Elementary SchoolA-
Elementary · Grades KG–5 · 1.5 mi
M
Hudson Bend Middle SchoolA-
Middle · Grades 6–8 · 4.2 mi

District: Lake Travis Independent School District

Neighborhood · ZIP 78738These are comparison scores, not percentages. 100 equals the national average, so 150 means about 50% above average.

CrimeLocal crime compared with the rest of the country, where 100 is average. It reflects things like population density, income, and how crime gets reported.39
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.83
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.19

Index scale: 100 = US average (tick). Lower is better.

Homes occupiedThe share of homes here that someone lives in. The rest sit empty, including vacation and for-sale homes.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.46%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.7%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.26,022
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.693 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$148,007
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$201,139
Average tempThe average temperature here across a full year.67°F
Annual precipHow much rain and melted snow falls here in a typical year.35 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.60%

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Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

How this home compares

121 Sebastians Run measured against every home in its neighborhood, its ZIP code and its county, using county assessor records refreshed nightly. A home can stand out in one of those areas and look ordinary in another, because each one holds a different mix of homes.

  • Worth more than 94% of homes in Travis County
  • Costs more per square foot than 86% of homes in Lakeway
  • Bigger than 95% of homes in Travis County
  • Has a bigger lot than 86% of homes in Travis County
  • Older than 74% of homes in Austin 78738

What homes are worth in Austin 78738

Each bar is how many homes fall in that price range. The marker is this home.

This home
$438K$3.5M

This home is worth more than 85% of homes in Austin 78738.

How it measures up in Austin 78738

The dot is this home. The mark in the middle is the typical home in Austin 78738.

Estimated value$1,573,042
CheaperTypical $924,285Pricier

Pricier than 85% of homes nearby

Price per ft²$375
CheaperTypical $288Pricier

Pricier than 74% of homes nearby

Living area4,197 ft²
SmallerTypical 3,260 ft²Bigger

Bigger than 81% of homes nearby

Lot size0.45 ac
SmallerTypical 0.26 acBigger

Bigger than 77% of homes nearby

Year built2004
OlderTypical 2013Newer

Newer than 26% of homes nearby

How 121 Sebastians Run ranks against every home in each area.
MeasureThis homeLakewayAustin 78738Travis County
Estimated valuepricier than$1,573,04291% of homes85% of homes94% of homes
Price per ft²pricier than$37586% of homes74% of homes75% of homes
Living areabigger than4,197 ft²90% of homes81% of homes95% of homes
Lot sizebigger than0.45 ac78% of homes77% of homes86% of homes
Year builtnewer than200466% of homes26% of homes61% of homes

About 121 Sebastians Run

How much is 121 Sebastians Run, Austin, TX worth?

The TopHap Estimate for 121 Sebastians Run, Austin, TX is $1,573,042 as of Aug 30, 2026. The likely range is $1,452,266 to $1,693,818. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 121 Sebastians Run, Austin, TX last sell?

121 Sebastians Run, Austin, TX last sold on Jun 18, 2015, according to the county's recorded deed.

How big is 121 Sebastians Run, Austin, TX?

121 Sebastians Run, Austin, TX has 4 bathrooms, 4,197 square feet of living space and a 0.45-acre lot.

When was 121 Sebastians Run, Austin, TX built?

121 Sebastians Run, Austin, TX was built in 2004, making it 22 years old. The building has 2 stories.

What schools serve 121 Sebastians Run, Austin, TX?

121 Sebastians Run, Austin, TX is assigned to Lake Travis High School (high), rated A-; Lakeway Elementary School (elementary), rated A-; Hudson Bend Middle School (middle), rated A-. All sit in Lake Travis Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 121 Sebastians Run, Austin, TX compare to other homes in Austin 78738?

Among the 11,574 homes in Austin 78738, it is worth more than 85% of them ($1,573,042 against a typical $924,285), its price per square foot is higher than 74% of them ($375 against a typical $288), it is bigger than 81% of them (4,197 ft² against a typical 3,260 ft²), its lot is bigger than 77% of them (0.45 ac against a typical 0.26 ac) and it is newer than 26% of them (2004 against a typical 2013). Measured against all of Travis County, it is worth more than 94% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 121 Sebastians Run, Austin, TX?

The 2024 property tax bill for 121 Sebastians Run, Austin, TX was $13,015. The county assessed it at $991,318.

More homes on Sebastians Run

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